While it would be impossible for me to list every interest here, I'll do my best.
Programming is my primary interest and it takes up most of my time either in developing or researching new techniques and methods.
Somewhat related to programming, I seriously enjoy reverse engineering file formats and potentially some software reverse engineering as well. I reverse engineered Nero BackItUp's project format to build a tool which allowed me to restore backups without the official software due to how awfully slow it was.
I love mechanical work, probably in part thanks to my Industrial Maintenance work for Tyson Foods, and I always perform my own vehicle maintenance. I also love trying to fix anything that comes my way, typically lawn mowers and garden power tools.
I've had a long lasting interest in 3D Modeling and I've learned a lot with Blender, although I'm far from being proficient with it or any 3D package.
Of course, electronics is an interest as well. I currently perform electronics repairs on C-130 Color Weather Radar equipment and I also have a particular interest in electric motors and electromechanical gadgets.